EVA-3491: Add schema for submission tables

[apriltuesday]

Also added the Gitlab deployment since I think it makes sense at this point, we can discuss...

[nitin-ebi]

Looks Good.
Could you also add this as a default schema, I guess it is possible to define it in spring-properties, something like this:
spring.jpa.properties.hibernate.default_schema=eva_submissions (have not tested this though)
Just as a protective measure, there is always a chance of messing up or forgetting when creating new tables or writing new queries

[apriltuesday]

@nitin-ebi Good point, added